Travis: Indentation / list fixes (#1254)

Fixes the tools/indentation.awk script to not demand a comma at the end of perfectly valid comments.
Makes it report unnecessary commas in lists.
Readds it to the Travis build list.

code/modules/client/preferences_factions.dm

@@ -21,7 +21,7 @@ var/global/list/citizenship_choices = list(
 	"People's Republic of Adhomai",
 	"Izweski Hegemony",
 	"Zo'ra Hive",
-	"K'lax Hive",
+	"K'lax Hive"
 	)
 
 var/global/list/home_system_choices = list(
@@ -62,4 +62,4 @@ var/global/list/religion_choices = list(
 	"Ma'ta'ke",
 	"Th'akh",
 	"Sk'akh"
-	)
+	)

code/modules/client/preferences_gear.dm

@@ -13,7 +13,7 @@ var/global/list/gear_datums = list()
 		"[slot_shoes]"		= list(),
 		"utility"			= list(),
 		"misc"				= list(),
-		"unknown"			= list(),
+		"unknown"			= list()
 	)
 
 	//create a list of gear datums to sort